Up: Rendering methods
`CPK' is a combination of both
in that it draws the atoms as spheres and the bonds as cylinders.
The resolution and radius can be modified independently.
The size of the sphere drawn in CPK mode is by default the
scaled-down VDW radius, but this scaling-factor can be changed by adjusting
the Sphere Scale parameter. Since a sphere is drawn for each atom, it
will always be slower than the `VDW' option.
If the radii for a sphere or bond are too small, they will not be drawn.